Investigators around the world are still trying solve the deepening mystery of the vanishing of Malaysia Airlines flight MH370. The plane with 239 people on board disappeared last Saturday an hour after leaving Kuala Lumpur for Beijing. The massive search area has now expanded to the Indian Ocean. Speculation and many unanswered questions remain as distressed families and the world wait for a definite outcome. --Leanne Burden Seidel (35 photos total)

A crew member from the Royal Malaysian Air Force looks through the window of a Malaysian Air Force CN235 aircraft during a Search and Rescue (SAR) operation to find the missing Malaysia Airlines flight MH370, in the Straits of Malacca March 13. (Samsul Said/Reuters)

A Chinese relative of passengers aboard a missing Malaysia Airlines plane, center, cries as she is escorted by a woman while leaving a hotel room for relatives or friends of passengers aboard the missing airplane, in Beijing, China, March 9. (Andy Wong/Associated Press) #

Indonesian Air Force officials at Medan city military base plot the Indonesian military search operation for the missing Malaysian Airlines flight MH370 on March 12, in the area of Malacca Strait, a sea passageway between Indonesia (seen left of the map) and Malaysia (seen right on the map). Malaysia faced a storm of criticism on March 12 over contradictions and information gaps in the hunt for a missing airliner with 239 people on board, as the search zone dramatically veered far from the intended flight path. (Atara/AFP/Getty Images) #

Ignatius Ong, a member of the Malaysia Airlines (MAS) crisis management team, reacts as he prepares to answer a question at a press conference in Beijing on March 9. Malaysia launched a terror probe into the disappearance the day before of the MAS passenger jet, carrying 239 people from Kuala Lumpur to Beijing, investigating suspect passengers who boarded with stolen passports, as relatives begged for news of their loved ones. (Wang Zhao/AFP/Getty Images) #

A relative (woman in white) of a passenger onboard Malaysia Airlines flight MH370 cries as she talks on her mobile phone at the Beijing Capital International Airport March 8. The Malaysia Airlines flight carrying 227 passengers and 12 crew lost contact with air traffic controllers early on Saturday en route from Kuala Lumpur to Beijing, the airline said in a statement. Flight MH 370, operating a Boeing B777-200 aircraft departed Kuala Lumpur at 12.21 a.m. (1621 GMT Friday) and had been expected to land in the Chinese capital at 6.30 a.m. (2230 GMT) the same day. (Kim Kyung-Hoon/Reuters) #

A Chinese relative of the passengers aboard the missing Malaysia Airlines plane passes a demand letter for the airlines, signed by other relatives, to the media at a hotel, in Beijing, China March 9. (Andy Wong/Associated Press) #

Photographs showing one of the passengers of the missing Malaysian Airlines aircraft Chandrika Sharma, left, her husband Narendran and daughter Meghna, are displayed during a press conference in Chennai, India, March 12. Narendran criticized the Indian government for its silence and said no government official has contacted them on the incident yet, according to a local news agency. Malaysia has asked for India's assistance in searching for the missing Boeing 777 jetliner to widen the search to an area near the Andaman Sea. (Arun Sankar K/Associated Press) #

Family members comfort Chrisman Siregar, left, and his wife Herlina Panjaitan, the parents of Firman Siregar, one of the Indonesian citizens registered on the manifest to Malaysia Airlines jetliner flight MH370 at their residence in Medan, North Sumatra, Indonesia, March 9. (Binsar Bakkara/Associated Press) #

Over a dozen microphones are propped on a table as Malaysian police chief Khalid Abu Bakar answers questions from members of the media, raising their hands waiting their turn as seen in the shadows cast on stage during a press conference, March 11, in Sepang, Malaysia. (Wong Maye-E/Associated Press) #

A Vietnamese military official works with a map inside a flying Soviet-made AN-26 of the Vietnam Air Force during search and rescue (SAR) operations for a missing Malaysian Airlines flight, off Vietnam's sea, March 13. (Luong Thai Linh/EPA) #

A general view from an AN-26 aircraft from the Vietnamese airforce, during a mission to find the missing Malaysia Airlines flight MH370, shows Tho Chu island March 11. The massive search has drawn in military aircraft, coastguard and civilian vessels from 10 nations, but failed to turn up any trace of the Boeing 777-200ER that vanished about an hour into a flight from Kuala Lumpur to Beijing early on Saturday. (Kham/Reuters) #

A journalist holds up a photo of one of the two men whom the Malaysian police believe were travelling onboard the missing Malaysia Airlines MH370 on stolen passports after a news conference at Kuala Lumpur International Airport, March 11. (Edgar Su/Reuters) #

Students from an international school in east China city Zhuji pray for the passengers onboard Malaysia Airlines flight MH370 by lighting candles on March 10, in Zhuji, China. (ChinaFotoPress via Getty Images) #

A man watches a large screen showing different flights at the departure hall of Kuala Lumpur International Airport March 13. Search planes found no sign on of the missing Malaysia Airlines aircraft, Flight MH370, in an area where satellite images had shown debris, taking the as-yet fruitless hunt. (Damir Sagolj/Reuters) #

Vietnamese Air Force Col. Pham Minh Tuan uses binoculars on board a flying aircraft during a mission to search for the missing Malaysia Airlines flight MH370 in the Gulf of Thailand over the location where Chinese satellite images showed possible debris from the missing Malaysian jetliner, March 13. (Associated Press) #

Grieving Indonesian mother Suharni (L) displays a portrait of her son Sugianto Lo and wife Vinny Chynthya, who are both passengers of the missing Malaysia Airlines flight MH370, from their residence in Medan in Sumatra island on March 10. (Kharima Tarigan/AFP/Getty Images) #

People stand on the Bund across from illuminated buildings, on one of which is seen the flight number MH370 of the Malaysia Airlines plane that has been missing since Saturday, in Shanghai, March 12. (Aly Song/Reuters) #

Personnel from the Republic of Singapore Air Force (RSAF) scanning the seas about 140 nautical miles north-east of Kota Baru, Malaysia, for any signs of the Malaysia Airlines plane which went missing. (Desmond Lim/AFP/Getty Images #

Candles are lit next to messages as students express hope and solidarity for the passengers aboard the missing Malaysian Airlines plane, March 13, in Manila, Philippines. (Bullit Marquez/Associated Press) #

Family members of passengers aboard Malaysia Airlines flight MH370 vote to set a deadline for the company to answer their requests, including providing solatium without additional conditions, at a hotel in Beijing, March 11. (Chance Chan/Reuters) #

A crew member of a Royal Malaysian Air Force CN-235 aircraft rests after long hours working in a search and rescue operation for the missing Malaysia Airlines plane over the Straits of Malacca, March 13. Planes sent Thursday to check the spot where Chinese satellite images showed possible debris from the missing Malaysian jetliner found nothing. (Lai Seng Sin/Associated Press) #

A member of a rescue team looks through binoculars during a search and rescue operation to find the missing Malaysia Airlines Flight MH370, in the Straits of Malacca on March 14. (Junaidi Hanafiah/Reuters) #

A man wearing a mask, who claimed to be a relative of a passenger from the missing Malaysia Airlines flight MH370, speaks to the media outside the lounge in Beijing on March 14. Malaysia confirmed on March 14 that the search for a missing Malaysia Airlines plane had been expanded into the Indian Ocean, but declined to comment on US reports that the jet had flown for hours after going missing. (Wang Zhao/AFP/Getty Images) #

Members of the public, MAS staff, and politicians pray during a special prayer as the search for missing Malaysian airline MH370 expands to the Indian Ocean March 14, in Kuala Lumpur, Malaysia. (Rahman Roslan/Getty Images) #

A Royal Malaysian Air Force Navigator captain Izam Fareq Hassan (R) talks with his team members onboard a Malaysian Air Force CN235 aircraft during a search and rescue (SAR) operation to find the missing Malaysia Airlines flight MH370 plane over the Strait of Malacca on March 14. (Mohd Rasfan/AFP/Getty Images) #